Data analysis in storage system

1. A method of analyzing data in a storage system including a plurality of host computing devices (hosts), the method comprising: performing, by a storage virtual machine (VM) running on a first host of the storage system, a data storage job directed at a first storage device of the storage system; after performing the data storage job, orchestrating a data analytic job with respect to target data stored in the first storage device by: issuing a data analytic request by a scheduler of the storage system to a data analytic VM running on a second host of the storage system; in response to the data analytic VM receiving the data analytic request, obtaining metadata that indicates information about the target data including its position from a data retrieving VM running on the second host; issuing a data request for the target data using the metadata from the data analytic VM to the storage VM; obtaining, by the storage VM, the target data for the data analytic job from the first storage device; storing the obtained target data into a second storage device of the storage system that is assigned for data analysis, the second storage device being local to the second host; and performing the data analytic job by the data analytic VM, including the data analytic VM accessing the target data from the second storage device.

2. The method of claim 1 , wherein performing the data analytic job comprises: creating a plurality of virtual machines for data analysis in the storage system; and scheduling the data analytic job onto the plurality of virtual machines.

3. The method of claim 2 , further comprising: virtualizing the second storage device into a plurality of virtual storage devices; and allocating the plurality of virtual storage devices for the plurality of virtual machines.

4. The method of claim 3 , wherein scheduling the data analytic job onto the plurality of virtual machines comprises: scheduling a first task of the data analytic job onto a first virtual machine of the plurality of virtual machines, the first virtual machine being associated with a virtual storage device of the plurality of virtual storage devices that stores the target data, and the first task directly analyzing the target data; and scheduling a second task of the data analytic job onto a second virtual machine of the plurality of virtual machines, the second task analyzing an intermediate result produced by the first task.

5. The method of claim 1 , wherein the second storage device includes a cache device of the storage system, the method further comprising: in response to the data analytic VM receiving the data analytic request transmitting an add command to the cache device to assign the cache device for data analysis; and in response to completion of the data analytic job, transmitting a remove command to the cache device to cease assignment of the cache device for the data analysis.

6. The method of claim 1 , wherein the data analytic job includes a first task and a second task, the second task being based on an intermediate result produced by the first task, and the method further comprising: storing the intermediate result in a cache device of the storage system during the performing of the data analytic job.

7. The method of claim 1 , further comprising the scheduler issuing the data analytic request in response to detection of completion of the data storage job.

8. The method of claim 1 , further comprising: storing into the first storage device a result of the performing of the data analytic job.

9. The method of claim 1 , wherein the data analytic job includes a MapReduce job.

10. The method of claim 1 wherein: the storage system is a backup system; the data storage job is a backup job configured to be performed within a backup time period; and issuing the data analytic request is performed in response to the scheduler detecting that the backup time period has expired.

11. The method of claim 1 wherein the data storage job includes one of: saving data to the first storage device; data replication from the first storage device; data de-duplication with respect to the first storage device; and data recovery from the first storage device.